#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
#include<vector>
using namespace std;
class Solution {
public:
    vector<int> searchRange(vector<int>& nums, int target) {
        int n = nums.size();
        int left = 0;
        int right = n - 1;
        if (n == 0)
        {
            return { -1,-1 };
        }
        while (left < right)
        {
            int mid = (left + right) / 2;
            if (nums[mid] >= target)
                right = mid;
            else
            {
                left = mid + 1;
            }
        }
        if (nums[left] != target)
        {
            return { -1,-1 };
        }
        int retleft = left;
        left = 0;
        right = n - 1;
        while (left < right)
        {
            int mid = (left + right + 1) / 2;
            if (nums[mid] > target)
                right = mid - 1;
            else
            {
                left = mid;
            }
        }
        return { retleft,left };
    }
};